US1912993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding hollow articles
Assignee: Metropolitan Engineering Co
•
Filing: 1930-12-10
•
Granted: 1933-06-06
•
Expires: 1950-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas E Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
B; B23; B23K; B23K33/00; B23K33/004; B23K33/006; B23K37/00; B23K37/06; B23K9/00; B23K9/02; B23K9/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-06-05 | 1936-12-05 | 1937-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-05 | 1940-12-05 | 1941-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-05 | 1944-12-05 | 1945-06-06 | $7700.00 | Window Closed / Lapsed |